济南市春季大气颗粒物的谱分布特征  

The Size Distribution Characteristic of the Atmospheric Particles during Spring in Jinan

作　　者：古金霞[1,2,3] 杜世勇 田维[3] 白志鹏[4] 韩道汶 刘建军 刘光辉 侯鲁健 杨文[4] 武鑫[3] 

机构地区：[1]济南市环境保护科学研究院,山东济南250014 [2]南开大学环境科学与工程学院,天津300071 [3]天津城建大学理学院,天津300384 [4]中国环境科学研究院,北京100012

出　　处：《南开大学学报（自然科学版）》2014年第1期92-98,共7页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：天津市科技计划项目(11JCYBJC05200);济南市科技计划项目(201101090)

摘　　要：2011年5月在济南市监测粒径范围为3nm^10μm大气颗粒物的谱分布特征,其数浓度呈现为典型的单峰型谱分布,表面积谱呈双峰型分布,而体积谱则呈多峰分布.从各个模态对颗粒物总数浓度、表面积浓度和体积浓度的贡献来看,爱根核模态粒子对总数浓度贡献最大,积聚模态粒子对总表面积浓度和总体积浓度贡献最大,表明济南市大气细粒子污染严重.各个模态颗粒物数浓度的日变化特征明显,是污染源和气象因子联合作用的结果.通过对各个模态颗粒物数浓度与其它因子(PM10、PM1、能见度、SO2和NO2)的相关性分析得出,提升能见度的关键是降低积聚模态颗粒物的浓度.风速对各个模态颗粒物数浓度的作用不同,核模态和爱根核模态颗粒物数浓度的变化趋势与风速一致,而积聚模态和粗粒子模态颗粒物的数浓度与风速的关系较为复杂.Abstract： The particle size distribution （3 nm-10 μm） was conducted in May of 2011 in Jinan city. The number size distribution, surface size distribution and volume size distribution was the single peak pattern, double-peak pattern and many peaks pattern, respectively. The maximum contributions to number, surface and volume concentration were particles in Aitken mode, accumulation mode and accumulation mode, respectively, indicating the fine particles pollution in atmospheric particles of Jinan city was very serious. Owing to the union effect of the contaminative sources and meteorological factors, the diurnal variations of the particulate number concentration in all the modes were obvious. By the analysis of the relationship be- tween particulate number concentration in all modes and other factors （PM10, PM1, visibility, SO2 and NO~）, indicating it was very pivotal to reduce the number concentration of particles in Aitken mode for improving the visibility. Wind speed played a different role in shaping the par- ticle number size distributions in the different modes. The variation trend of particulate number concentration in nucleation and Aitken modes was same with the variation of the wind speed. But the relationship between the particulate number concentration in accumulation and coarse modes and wind speed were relatively complex.

关 键 词：大气颗粒物 核模态 爱根核模态 积聚模态 粗粒子模态 

分 类 号：X51[环境科学与工程—环境工程]